Question

4√2(2-7√8)-7√2
(√5+1)(2-√5)-√5
(√3-7)(4-√3)-11√3
(2+√3)(1-√3)+1
(√3-√11)(√33+1)

Answer 1

1.
=8!/2 -28!/16-7!/2=!/2-28×4=!/2-112
2.
=2!/5 -5 +2 -!/5 -!/5=-3
3.
=4!/3 -3 -28+7!/3 -11!/3=-31
4.
=2 -2!/3 +!/3 -3 +1=- !/3
5.
=!/99 +!/3 -!/11×33 -!/11=!/9×11 +!/3 -!/3×11×11 -
-!/11=3!/11 +!/3 -11!/3 -!/11=2!/11 -10!/3